The Marriage at Midsummer (5E)

From publisher blurb:

Two star-crossed lovers have gone missing. Their families are at each other’s throats. After some investigation, the PCs learn that teenagers plan to elope to the fey-infested Runewild, where a mysterious figure called the Bishop promises to unite any couple.

But the Bishop has other plans.

The Marriage at Midsummer is an adventure for three to five 1st-level characters, designed to be played in a single session. You can use it to introduce the Runewild Campaign Setting (coming soon!) or drop the adventure into an existing campaign.

In addition to the story the adventure also contains:

1 new monster: the prismatic centipede
2 new magic items: the crook of the Bishop and hitching bands